According to this poll of D.C. insiders, Tom Toles, editorial cartoonist, is the 48th most powerful person in Washington. You can see his cartoons online here.
Skimming through the last month or so of his cartoons, I liked this one the best:

EU Frets as Germany Changes Banking Rules || INO.com News
The Thing is Done: Bush Signs Bailout Into Law || AP News
Biden-Palin Debate Fails to Move the Bar for Either Candidate || McClatchy
Skype Spies on Chinese Customers, Sparks Outrage at Home || Reuters News
House to Revisit the Bailout After Senate Passage || MSNBC.com